| 摘要 |
PURPOSE:To exchange type easily by forming a type ring by a type holder, which is freely mounted and demounted to a large number of holes shaped near the outer circumference of a sheet-shaped spur gear, and a leaf spring-shaped type section. CONSTITUTION:The type ring is formed by a type ring gear section 210, in which a bearing 212, to a plate surface thereof a silght clearance is shaped, is set up at the center of the sheet-shaped spur gear 211, a section in the vicinity of the outer circumference thereof has a large number of the holes equally dividing the circumference, the type holder section 220, in which a holder 227, into which the type section is inserted, is fitted to the intermediate section of an external disk 223, an outer circumferential secion thereof has the same holes as the gear section 210, to one part thereof a leaf spring-shaped knob 225 combining a stud is molded, and to which the holes of a plate surface and a ball notch type stopper 226 are formed, and an internal disk 224, and the detechable type section 230, the nose of a leaf spring 232 thereof has light small-sized type 231, a waist section thereof has bends 233, 234, and intermediate section thereof has a constriction 236 and a lower end thereof has a spring-shaped check plate section 235. |
